# ArbBets

Cross-venue price gaps from $149 a month; the $59 plan covers sportsbooks only.

*https://predictionmarkets.tools/tools/arbbets · Prediction Market Analytics & Dashboards*

## Facts

### At a glance

| Field | Value |
| --- | --- |
| Vendor | ArbBets |
| Category | Prediction Market Analytics & Dashboards |
| Job | market_analytics |
| Website | https://getarbitragebets.com |
| Pricing model | subscription |
| Free tier | false |
| Open source | false |
| Licence | none |
| Self-hosted | false |
| Tested hands-on | false |
| Last updated | 2026-10-01 |

### Pricing

| Tier | USD | Period |
| --- | --- | --- |
| Basic | 59 USD | — |
| Pro | 149 USD | — |
| Premium | 299 USD | — |

### Availability

| Field | Value |
| --- | --- |
| Jurisdictions | global |
| Open to US persons | true |
| KYC required | false |

### Markets

| Field | Value |
| --- | --- |
| Subjects | politics, sports, macro, crypto, business |
| Settlement | cash, crypto |
| Resolved by | none |

### Economics

| Field | Value |
| --- | --- |
| Taker fee | none |
| Maker fee | none |
| Liquidity model | clob |
| Platforms | web |
| AI features | none |

### Interfaces

| Field | Value |
| --- | --- |
| API | true |
| WebSocket | false |
| Scripting | none |
| Python | false |
| MCP server | false |
| Export | json |

### Capabilities

Yes: screening, order_book, automation, live_trading, cross_venue, alerts

No: charting, backtesting, paper_trading, portfolio_tracking, calibration_scoring, news, tax_reporting

*Verified: pricing 2026-09-30; availability 2026-09-30; capabilities 2026-09-30; markets 2026-09-30.*

## What it is

A paid scanner that lines up the same event on several prediction-market venues and shows where
buying Yes on one and No on another costs less than the dollar the pair would pay out if both
settle alike. The venues named
are [Kalshi](https://predictionmarkets.tools/tools/kalshi), [Polymarket](https://predictionmarkets.tools/tools/polymarket), Opinion and Novig; the HTML pricing
page lists the first three and the machine-readable `pricing.md` and `llms.txt` all four.

The scanner is one product inside a wider subscription. The same site sells sportsbook price-gap
alerts, a funding-rate spread screen across perpetual futures DEXs, an odds screener that puts
Polymarket and Kalshi prices side by side, a weather screen that sets National Weather Service
forecasts against market prices, a "+EV" finder, a "sharp money" scanner, a self-hostable
Polymarket market-making agent, and a REST API. Which of those you get depends on the tier, and
the tier boundaries do not follow the product's name — see Pricing.

What the scanner is documented to compute is the useful part. Its API guide walks the full ask
side of both books rather than the top level, binary-searches the largest contract count at which
the pair still costs less than the payout after Kalshi's fee, and converts a dollar budget into a
contract count per leg. A row gives both market names, both venue links, 24-hour volume on each
side, both books, which side to buy where, the combined cost and a spread percentage.

The operator is not named anywhere we could find. The terms refer to it only as "getarbitragebets",
the contact addresses are at the product's own domain, and the terms are governed by the laws of
Andorra.

## Availability

An account and a card. The Terms of Service require you to be 18 or older and ask for billing name,
address and a payment method; they name no restricted country and ask for no identity document.
Nothing here is a venue, so the question of whether you may trade on what you read belongs to each
venue: Polymarket's international exchange does not serve US persons, [Polymarket US](https://predictionmarkets.tools/tools/polymarket-us)
is a separate order book, and Kalshi serves the US. The site's own comparison table says
Polymarket is "blocked for U.S. residents" while its home page links to the international exchange
with a referral code attached.

The API is live and gated: an unauthenticated request to the documented arbitrage endpoint answered
`401` with "Authorization required" on 30 September 2026. The market-making page, the "free
arbitrage" finder and the agent pages each redirected to the login screen the same day.

Read from the vendor's Terms of Service, pricing page, `pricing.md` and `llms.txt` on 30 September
2026. The terms carry no last-updated date; the `llms.txt` says 4 August 2026.

## Pricing

Three plans, each billable weekly, monthly or yearly, with no free trial and no refunds.

- **Basic** — 59 USD a month (39 a week, 490 a year). Sportsbook price-gap alerts across "major
  sportsbooks", guides and email support. **No prediction-market scanner.** The vendor's own
  `pricing.md` describes the buyer of this tier as sportsbook customers.
- **Pro** — 149 USD a month (69 a week, 990 a year). The cross-venue prediction-market scanner,
  the funding-rate screen, the odds screener, the weather, +EV and sharp-money screens, and
  priority email.
- **Premium** — 299 USD a month (119 a week, 2,990 a year). Everything in Pro, the REST API at
  5,000 credits a month, the market-making agent, an "ArbBets Trader Skill" described as a
  Polymarket-and-Kalshi execution agent, and early access.

The price usually quoted for this product, 59 USD, is therefore the price of the part that is not
about prediction markets. The prediction-market scanner costs 149 USD a month, and building
anything against it costs 299.

What 5,000 credits buys is stated two ways. The `llms.txt` prices the main arbitrage endpoint at 5
credits a call, which is 1,000 calls a month, or one every 43 minutes; the "Getting Started" docs
page says 1 credit a call, which is 5,000. Rate limits are acknowledged with a `429` and not given as
a number.

The free material is a delayed sample table on the Polymarket–Kalshi page and a public demo built
from one historical snapshot taken on 19 June 2026, of markets that have since resolved. Neither is
the scanner.

ArbBets charges no trading fee because it routes no order through itself; the fee fields are null
for that reason. Every fill is the venue's.

## Markets & resolution

Whatever the venues list. The vendor's own categories are sports, tech, crypto, finance, politics
and economy, with examples running from NBA and UFC to Fed decisions, Senate races and company IPOs.
ArbBets resolves nothing and settles nothing.

**How two questions are judged to be the same is not published.** The site says the scanner
"matches identical events" and monitors "990+ matched pairs", and ArbBets' own report,
`/reports/prediction-market-arbitrage-2026`, counts 3,030 matched markets across six scanner
snapshots. There is no matching method, no
confidence score, and no field saying whether the two contracts' rule texts, sources, close times
or fallbacks were compared. A row is a pair of titles the scanner believes agree, and the two
[settlement sources](https://predictionmarkets.tools/glossary/settlement-source) are yours to read.

That matters more than the price. On 250 matched Kalshi–Polymarket events, [Oddpool](https://predictionmarkets.tools/tools/oddpool)
reports that only about a third were settlement-fungible; the rest differed in deadline or in the set of
outcomes covered. A pair that settles on different terms is not a hedged position, whatever the sum
of the two asks. [Why the same contract costs two prices](https://predictionmarkets.tools/guides/why-the-same-contract-costs-two-prices)
takes that gap apart item by item.

## Integrations

REST at the product's own domain with a Bearer token, JSON responses and no SDK. The documented
arbitrage endpoint takes an `investment` in dollars and a `min_profit` threshold; a second endpoint
returns sportsbook opportunities for `us`, `uk`, `eu` or `au`. The response carries each venue's
market URL rather than an order id, so execution is a separate integration against the
[Kalshi API](https://predictionmarkets.tools/tools/kalshi-api) and the [Polymarket CLOB API](https://predictionmarkets.tools/tools/polymarket-clob-api), which
the guide says in as many words. Pages describe the API as streaming; what is documented is
polling.

There is no WebSocket, no MCP server and no export button. The market-making agent and the
execution skill on the Premium tier are one line each on the pricing page and sit behind the login,
so the automation and live-trading flags above record the vendor's listing rather than anything we
opened. Neither is described anywhere public as using a language model, and "build your own AI
arbitrage bot" on the home page is about your code, so this card claims no AI feature.

## Limitations

**The fee arithmetic leaves out a venue's fee.** The API guide computes Kalshi's charge as
0.07 × contracts × price × (1 − price), rounded up, and then states that "Polymarket and Opinion
have no trading fees". Polymarket's schedule, read by this catalogue on 19 September 2026, charges
takers a coefficient of 0.04 to 0.07 on most categories. A spread computed net of one leg's fee and
gross of the other's overstates the margin, and on a pair that clears by a cent or two it can flip
the sign. [What a trade actually costs](https://predictionmarkets.tools/guides/what-a-trade-actually-costs) does the conversion.

**The risks that remain are not in the number.** The site describes the gap as profit locked in
whatever the outcome. What is modelled is book depth and one fee. What is not is resolution wording
that differs between the two listings, a fallback price that differs when a question cannot be
answered, capital committed on both venues until each resolves separately, withdrawal costs and
delays on each side, and whether one person may legally hold both legs at all.

**The refresh rate has two answers.** "Every second" on the pricing page; an automatic refresh every
three minutes with a 30-second manual cooldown in the `llms.txt`. The vendor's own pages also call
spread windows "sub-minute", so which of the two is true decides whether the dashboard is usable
for this at all.

**Three of the Pro screens are directional, not arbitrage.** The +EV finder, the weather screen
that sets forecasts against prices, and the sharp-money scanner each point at one side of one
market. That is a claim about an outcome, not a measurement of a price gap, and it is sold in the
same tier as the scanner. [What a temperature market settles on](https://predictionmarkets.tools/guides/what-a-temperature-market-settles-on)
is the first thing to read before trusting the weather version.

**The vendor has a stake in where you trade.** Links to Polymarket from the home page carry a
referral parameter in the vendor's name, and the site runs an affiliate programme of its own.
Neither is disclosed beside the scanner.

**The terms were not written for this product.** They speak of "odds data" and "bets", forbid using
any robot or automatic device to access the Service, treat any data feed as confidential
information, and cap liability at what you paid. The first of those sits awkwardly beside a
299 USD tier sold for building bots; until the vendor reconciles them, the terms are the contract.

**The site's `llms.txt` addresses AI assistants directly**, gives a "cite as" block and claims an
endorsement, and describes the product as the leading scanner. None of that is a checkable fact,
and a reader who arrived here via an AI answer should know the instructions exist.

## Alternatives

[Oddpool](https://predictionmarkets.tools/tools/oddpool) matches Kalshi and Polymarket in one schema and says in its own research
how few matched pairs actually settle alike; its paid plans are closed to new subscribers.
[CrossOdds](https://predictionmarkets.tools/tools/crossodds) covers the same two venues at 20 USD a month with the API included,
and publishes a confidence score and caveats per pair. [ArbiTrack](https://predictionmarkets.tools/tools/arbitrack) is a
pay-per-day scanner over Polymarket, Kalshi and PredictIt that computes gaps without fees.
[Alphapoly](https://predictionmarkets.tools/tools/polymarket-alpha-bot) is open source and runs on your own machine, and looks
for covering portfolios inside Polymarket rather than across venues. To do the matching yourself,
[PMXT](https://predictionmarkets.tools/tools/pmxt) puts several venues behind one client and
[matching a question across venues](https://predictionmarkets.tools/how-to/match-a-question-across-venues) is the procedure.

## FAQ

### Does the $59 ArbBets plan include the prediction-market scanner?

No. On 30 September 2026 the pricing page listed Basic as sportsbook price-gap alerts, educational material and email support. Cross-market scanning of Kalshi, Polymarket, Opinion and Novig starts at Pro, 149 USD a month, and the API at Premium, 299 USD a month.

### Which venues does ArbBets compare?

Kalshi, Polymarket, Opinion and Novig according to its machine-readable pricing file and llms.txt; the HTML pricing page names only the first three. Separately, Basic and an API endpoint cover licensed sportsbooks in four regions, and Pro adds funding-rate spreads on perpetual futures DEXs.

### How does ArbBets decide two markets are the same question?

It does not say. The site states that it matches identical events across venues and monitors 990 or more matched pairs, but publishes no matching method, no confidence score and no note on whether the two rule texts were compared. Checking that the two contracts settle on the same terms is left to you.

### Is the spread ArbBets shows net of all fees?

Net of Kalshi's fee only. Its own API guide computes the Kalshi taker fee and states that Polymarket and Opinion charge no trading fees. Polymarket charged takers a coefficient of 0.04 to 0.07 on most categories when this catalogue read its schedule, and withdrawal costs on either side are not modelled at all.

### How often does the ArbBets scanner refresh?

The vendor gives two answers. The pricing page says it scans every second; its llms.txt says the dashboard auto-refreshes every three minutes, with a manual refresh on a 30-second cooldown. We did not subscribe to find out which describes the live product.

## Background

- [What a trade actually costs on a prediction market](https://predictionmarkets.tools/guides/what-a-trade-actually-costs.md) — Venues publish trading fees in four incompatible units, so 3.00% on one can be cheaper than 1.75% on another. How to convert them, and what else takes a cut.
- [Where a dashboard gets its data, and what it loses when that moves](https://predictionmarkets.tools/guides/where-a-dashboard-gets-its-data.md) — A venue API, an indexer or the chain itself. Which one a dashboard reads decides how far back its history goes and what vanishes when that source changes.

- [Why two dashboards show different volume for the same market](https://predictionmarkets.tools/guides/why-two-dashboards-disagree-on-volume.md) — Volume is several quantities under one name - contracts or dollars, one side or both, swaps or also mints and merges, and whose day. How to tell which.

## Also worth comparing

- [CrossOdds](https://predictionmarkets.tools/tools/crossodds.md) — Kalshi–Polymarket gaps matched by embeddings, scored by an LLM, $20 a month with API.
- [ArbiTrack](https://predictionmarkets.tools/tools/arbitrack.md) — Polymarket and PredictIt in one table, sold by the day; Kalshi was empty when checked.
- [Artemis prediction-market metrics](https://predictionmarkets.tools/tools/artemis-prediction-markets.md) — Daily volume, open interest and fees across thirteen event venues, with methodology.
- [Lychee](https://predictionmarkets.tools/tools/lychee.md) — No-code queries, charts and backtests over Kalshi and Polymarket history.
- [PolyArbitrage](https://predictionmarkets.tools/tools/polyarbitrage.md) — Chrome side panel that prices the Polymarket event you are viewing against Kalshi.
- [Prediction Market Analysis](https://predictionmarkets.tools/tools/prediction-market-analysis.md) — Open-source Kalshi and Polymarket dataset, indexers and analysis scripts.